# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:filetype=tcl:et:sw=4:ts=4:sts=4

PortSystem                             1.0
PortGroup select                       1.0
PortGroup compiler_blacklist_versions  1.0
PortGroup conflicts_build              1.0
PortGroup xcode_workaround             1.0

name                gcc7
epoch               3
version             7.5.0
revision            4
subport             libgcc7 { revision 1 }
platforms           {darwin < 15}
categories          lang
maintainers         nomaintainer
# an exception in the license allows dependents to not be GPL
license             {GPL-3+ Permissive}
description         The GNU compiler collection
long_description    The GNU compiler collection, including front ends for \
                    C, C++, Objective-C, Objective-C++ and Fortran.

homepage            https://gcc.gnu.org/
master_sites        ftp://ftp.funet.fi/pub/mirrors/sources.redhat.com/pub/gcc/releases/gcc-${version}/ \
                    http://mirror.koddos.net/gcc/releases/gcc-${version}/ \
                    https://www.mirrorservice.org/sites/ftp.gnu.org/gnu/gcc/gcc-${version}/ \
                    ftp://ftp.gwdg.de/pub/linux/gcc/releases/gcc-${version}/ \
                    ftp://gcc.ftp.nluug.nl/mirror/languages/gcc/releases/gcc-${version}/ \
                    ftp://gcc.gnu.org/pub/gcc/releases/gcc-${version}/ \
                    gnu:gcc/gcc-${version}

distname            gcc-${version}
use_xz              yes

checksums           rmd160  91d46ec088badec75f41a2ad2a0ba228a6715107 \
                    sha256  b81946e7f01f90528a1f7352ab08cc602b9ccc05d4e44da4bd501c5a189ee661 \
                    size    62783088

# Check if this is the last supported gcc version for this system.
# If it is, libgcc7 installs a full runtime, otherwise it only installs
# what is missing from newer libgccX builds.
# NOTE : The logic here must match that in the libgcc port.
set isLastSupported [ expr ${os.major} < 10 ]

if { ${configure.build_arch} eq "i386" && ${os.major} >= 10 } {

    # fix no-pie clang bug bootstrapping gcc on i386
    # https://trac.macports.org/ticket/63161
    patchfiles-append  patch-gcc7-i686-clang-bootstrap-fix.diff
}

# Since GCC 7.4.0, during configure, it detects features supported by target-as.
# On the other hand, MacPorts cctools contain a proxy for 'as' that runs system
# 'as' or one of the supported MacPorts clang's 'as' if it is installed. Here,
# we may encounter a misconfiguration when GCC builds on a system with some
# MacPorts clang, and 'as' is using it. However, on a clean system, it uses
# system 'as' if no MacPorts clang is installed, which may behave differently.
# This can make GCC broken until MacPorts clang is installed. To avoid a stealth
# dependency on the used clang, I enforce building with system 'as'.
# See:
#  - https://trac.macports.org/ticket/68683
#  - https://github.com/gcc-mirror/gcc/commit/b410cf1dc056aab195c5408871ffca932df8a78a
patchfiles-append   patch-gcc7-disable-macports-cctools-as-changes.diff

configure.env-append \
                    DISABLE_MACPORTS_AS_CLANG_SEARCH=1 \
                    DISABLE_XCODE_AS_CLANG_SEARCH=1

build.env-append    DISABLE_MACPORTS_AS_CLANG_SEARCH=1 \
                    DISABLE_XCODE_AS_CLANG_SEARCH=1

depends_lib         port:cctools \
                    port:gmp \
                    path:lib/pkgconfig/isl.pc:isl \
                    port:ld64 \
                    port:zlib \
                    port:libiconv \
                    port:libmpc \
                    port:mpfr
depends_run         port:gcc_select
if { ${isLastSupported} } {
    depends_run-append  path:share/doc/libgcc/README:libgcc
} else {
    depends_run-append  port:libgcc7
}

depends_skip_archcheck-append gcc_select ld64 cctools
license_noconflict  gmp mpfr ppl libmpc

# Work around parallel building issue on APFS
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
patchfiles-append   notparallel-install-headers.patch

set major           [lindex [split ${version} .-] 0]

platform darwin {
    configure.pre_args-append --build=${build_arch}-apple-darwin${os.major}
}

platform darwin 8 i386 {
    patchfiles-append patch-gcc7-tiger-intel.diff
}

configure.dir       ${workpath}/build
configure.cmd       ${worksrcpath}/configure
configure.args      --enable-languages=c,c++,objc,obj-c++,lto,fortran \
                    --libdir=${prefix}/lib/${name} \
                    --includedir=${prefix}/include/${name} \
                    --infodir=${prefix}/share/info \
                    --mandir=${prefix}/share/man \
                    --datarootdir=${prefix}/share/gcc-${major} \
                    --with-local-prefix=${prefix} \
                    --with-system-zlib \
                    --disable-nls \
                    --program-suffix=-mp-${major} \
                    --with-gxx-include-dir=${prefix}/include/${name}/c++/ \
                    --with-gmp=${prefix} \
                    --with-mpfr=${prefix} \
                    --with-mpc=${prefix} \
                    --with-isl=${prefix} \
                    --enable-stage1-checking \
                    --disable-multilib \
                    --enable-lto \
                    --enable-libstdcxx-time \
                    --with-build-config=bootstrap-debug \
                    --with-as=${prefix}/bin/as \
                    --with-ld=${prefix}/bin/ld \
                    --with-ar=${prefix}/bin/ar \
                    --with-bugurl=https://trac.macports.org/newticket

# see https://lists.macports.org/pipermail/macports-dev/2017-August/036209.html
# --disable-tls does not limit functionality
# it only determines how std::call_once works
configure.args-append \
                    --disable-tls

configure.env-append \
                    AR_FOR_TARGET=${prefix}/bin/ar \
                    AS_FOR_TARGET=${prefix}/bin/as \
                    LD_FOR_TARGET=${prefix}/bin/ld \
                    NM_FOR_TARGET=${prefix}/bin/nm \
                    OBJDUMP_FOR_TARGET=${prefix}/bin/objdump \
                    RANLIB_FOR_TARGET=${prefix}/bin/ranlib \
                    STRIP_FOR_TARGET=${prefix}/bin/strip \
                    OTOOL=${prefix}/bin/otool \
                    OTOOL64=${prefix}/bin/otool

pre-configure {
    configure.args-append --with-pkgversion="MacPorts ${name} ${version}_${revision}${portvariants}"

    if {${configure.sdkroot} ne ""} {
        # We should be using --with-build-sysroot here.  Using --with-sysroot
        # changes the behavior of the installed gcc to look in that sysroot
        # by default instead of /.  Using --with-build-sysroot is supposed
        # to be used during the build but not impact the installed product.
        # Unfortunately, the build fails because the value doesn't get
        # plumbed everywhere it is supposed to.
        #
        # https://trac.macports.org/ticket/53726
        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79885
        #
        # Note that macports toolchains will fail to compile gcc unless
        # the DevSDK is installed due to another gcc build system bug:
        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80203
        configure.args-append --with-sysroot="${configure.sdkroot}"
    }

    # TODO: Remove when base automatically creates configure.dir (2.2.1?).
    file mkdir ${configure.dir}
}

# gcc cannot build if libunwind-headers is active
conflicts_build-append libunwind-headers

# http://trac.macports.org/ticket/29067
compiler.blacklist-append gcc-4.0

# http://trac.macports.org/ticket/29104
compiler.blacklist-append {llvm-gcc-4.2 < 2336.1}

# https://trac.macports.org/ticket/47996
compiler.blacklist-append {clang < 300}

# "-stdlib" would be passed on to the bootstrap compiler if present
configure.cxx_stdlib

build.dir           ${configure.dir}
build.target        bootstrap-lean
use_parallel_build  yes

destroot.target     install install-info-host

# List of all dylibs to possibly be installed
set alldylibs {libgcc_ext.10.4.dylib libgcc_ext.10.5.dylib libgcc_s.1.dylib libgfortran.4.dylib libquadmath.0.dylib libstdc++.6.dylib libobjc-gnu.4.dylib libgomp.1.dylib libitm.1.dylib libssp.0.dylib libasan.4.dylib libubsan.0.dylib libcilkrts.5.dylib libatomic.1.dylib}

if {${subport} eq "libgcc7"} {

    # If providing the primary runtime, add conflict against libgcc-devel
    if { ${isLastSupported} } {
        conflicts libgcc-devel
    }

    # Activate hack for new libgcc
    # https://trac.macports.org/wiki/PortfileRecipes#deactivatehack
    pre-activate {
        if {![catch {set installed [lindex [registry_active libgcc] 0]}]} {
            # Extract the epoch of the installed libgcc
            set _epoch [lindex $installed 5]
            # If < 3 need to deactivate
            if {[vercmp $_epoch 3] < 0} {
                registry_deactivate_composite libgcc "" [list ports_nodepcheck 1]
            }
        }
    }

    # http://trac.macports.org/ticket/35770
    # http://trac.macports.org/ticket/38814
    # While there can be multiple versions of these runtimes in a single
    # process, it is not possible to pass objects between different versions,
    # so we simplify this by having the libgcc port provide the newest version
    # of these runtimes for all versions of gcc to use.
    #
    # If there is a binary incompatible change to the runtime in a future
    # version of gcc, then the latest version of gcc to provide a given ABI
    # version should continue to provide a subport for that and older gcc
    # versions.

    if { ${isLastSupported} } {
        depends_run
        depends_lib-delete   port:zlib
        depends_build-append {*}${depends_lib}
        depends_lib          port:zlib
    } else {
        depends_run port:libgcc8
        depends_build-append {*}${depends_lib}
        depends_lib
    }

    configure.args-replace \
        --libdir=${prefix}/lib/${name} \
        --libdir=${prefix}/lib/libgcc

    # see https://trac.macports.org/ticket/54766
    configure.args-replace \
        --includedir=${prefix}/include/${name} \
        --includedir=${prefix}/include/gcc

    configure.args-replace \
        --with-gxx-include-dir=${prefix}/include/${name}/c++/ \
        --with-gxx-include-dir=${prefix}/include/gcc/c++/

    # TODO: Possibly disable bootstrap with appropriate configure flags.
    #       the problem is that libstdc++'s configure script tests for tls support
    #       using the running compiler (not gcc for which libstdc++ is being built).
    #       Thus when we build with clang, we get a mismatch
    # http://trac.macports.org/ticket/36116
    #compiler.blacklist-append {clang < 425}
    #configure.args-append --disable-bootstrap
    #build.target        all

    post-destroot {
        file mkdir ${destroot}${prefix}/lib/libgcc.merged

        # Note that we really don't want to include libgcc_ext.10.[45].dylib here, but install_name_tool
        # doesn't know how to change the id of stubs, and it's easier than recreating them for each
        # gcc port.
        if { ${isLastSupported} } {
            # Install all
            set dylibs ${alldylibs}
        } else {
            # Only install those not in newer libgcc builds
            set dylibs {libgfortran.4.dylib libquadmath.0.dylib libasan.4.dylib libubsan.0.dylib libcilkrts.5.dylib}
        }

        foreach dylib ${dylibs} {
            # Different OS versions (e.g. Leopard) or architectures (e.g. PPC) don't produce all the dylibs
            # https://trac.macports.org/ticket/40098
            # https://trac.macports.org/ticket/40100
            if {! [file exists ${destroot}${prefix}/lib/libgcc/${dylib}]} {
                continue
            }

            move ${destroot}${prefix}/lib/libgcc/${dylib} ${destroot}${prefix}/lib/libgcc.merged
            if {[variant_exists universal] && [variant_isset universal]} {
                foreach archdir [glob ${destroot}${prefix}/lib/libgcc/*/] {
                    set archdir_nodestroot [string map "${destroot}/ /" ${archdir}]
                    if {[file exists ${archdir}/${dylib}]} {
                        system "install_name_tool -id ${prefix}/lib/libgcc/${dylib} ${archdir}/${dylib}"
                        foreach link [glob -tails -directory ${archdir} *.dylib] {
                            system "install_name_tool -change ${archdir_nodestroot}${link} ${prefix}/lib/libgcc/${link} ${archdir}/${dylib}"
                        }
                        system "lipo -create -output ${destroot}${prefix}/lib/libgcc.merged/${dylib}~ ${destroot}${prefix}/lib/libgcc.merged/${dylib} ${archdir}/${dylib} && mv ${destroot}${prefix}/lib/libgcc.merged/${dylib}~ ${destroot}${prefix}/lib/libgcc.merged/${dylib}"
                    }
                }
            }

            # strip debug symbols to supress debugger warnings:
            # http://trac.macports.org/attachment/ticket/34831
            if {! [string match *libgcc_ext* ${dylib}]} {
                system "strip -x ${destroot}${prefix}/lib/libgcc.merged/${dylib}"
            }
        }

        file delete -force ${destroot}${prefix}/bin
        file delete -force ${destroot}${prefix}/share
        file delete -force ${destroot}${prefix}/lib/libgcc
        file delete -force ${destroot}${prefix}/libexec

        move ${destroot}${prefix}/lib/libgcc.merged ${destroot}${prefix}/lib/libgcc

        if { ${isLastSupported} } {
            # For binary compatibility with binaries that linked against the old libstdcxx port
            ln -s libgcc/libstdc++.6.dylib ${destroot}${prefix}/lib/libstdc++.6.dylib
        } else {
            # Remove includes. Provided by newer libgcc.
            file delete -force ${destroot}${prefix}/include
            # This is provided by the libgcc port
            file delete -force ${destroot}${prefix}/lib/libgcc/libquadmath.0.dylib
        }

    }

} else {
    post-destroot {
        file delete ${destroot}${prefix}/share/info/dir

        foreach file [glob ${destroot}${prefix}/share/{info,man/man7}/*] {
            set extension [file extension ${file}]
            set newfile [regsub "${extension}$" ${file} "-mp-${major}${extension}"]

            file rename ${file} ${newfile}
        }

        foreach dylib ${alldylibs} {
            # Different OS versions (e.g. Leopard) or architectures (e.g. PPC) don't produce all the dylibs
            # https://trac.macports.org/ticket/40098
            # https://trac.macports.org/ticket/40100
            if {[file exists ${destroot}${prefix}/lib/${name}/${dylib}]} {
                delete ${destroot}${prefix}/lib/${name}/${dylib}
                ln -s ${prefix}/lib/libgcc/${dylib} ${destroot}${prefix}/lib/${name}/${dylib}
            }

            if {[variant_exists universal] && [variant_isset universal]} {
                foreach archdir [glob ${destroot}${prefix}/lib/${name}/*/] {
                    if {[file exists ${archdir}/${dylib}]} {
                        delete ${archdir}/${dylib}
                        ln -s ${prefix}/lib/libgcc/${dylib} ${archdir}/${dylib}
                    }
                }
            }
        }
    }

    select.group        gcc
    select.file         ${filespath}/mp-${name}

}

platform powerpc {
    configure.universal_archs ppc ppc64
}
platform i386 {
    configure.universal_archs i386 x86_64
}
variant universal {
    configure.args-delete --disable-multilib
}
# the generated compiler doesn't accept -arch
configure.env-append \
    "CPP=${configure.cc} -E" \
    "CXXCPP=${configure.cxx} -E"
build.env-append \
    "CPP=${configure.cc} -E" \
    "CXXCPP=${configure.cxx} -E"

# gcc default optflags are required to build gcc7 with older compilers
# see https://trac.macports.org/ticket/59706
# we probably also want to clear out the rest of the configure.XYZ flags
configure.optflags

configure.cc-append [get_canonical_archflags]
configure.cc_archflags
configure.cxx-append ${configure.cxx_archflags}
configure.cxx_archflags
configure.objc_archflags
configure.ld_archflags
configure.universal_cflags
configure.universal_cxxflags
configure.universal_ldflags
configure.universal_args

livecheck.type      regex
livecheck.url       https://ftp.gnu.org/gnu/gcc/
livecheck.regex     gcc-(${major}\\.\[0-9.\]+)/